亲子乱高潮1000部,色婷婷五月综合亚洲小说,禁伦H肉高辣网站视频,亚洲成av人影院

棕剛玉P砂是在棕剛玉F砂標準的基礎上，通過進一步分篩和水洗工藝處理后加工而成。
    這種棕剛玉P砂在1000'C-1300℃高溫鍛燒，形狀是尖形，磨削力高，自銳性好，經過高溫處理后韌性極好，適用于做各種各
種高檔次的涂附磨具產品，比如砂紙，砂布，砂帶等
      Brown Fused Alumina for coated abrasives is produced under well water-washing and carefully sieving again on the basis of FEPA Standard.
      This is the kind of Brown Fused Aluminium Oxide grain for coated abrasives application is calcined under 1000'C-1300'C，the grain shape is very
sharp, high abrasive ability，good self-sharpening and very good toughness with the high temperature treatment. It is used for producing high quality all
kinds of coated abrasives products, such as sand paper, cloth, belts, and so on.